The first four ionization energies for element x (not in kj/mol) are 170, 350, 1800, 2500. the first four ionization energies for element y are 200, 400, 3500, 5000. identify elements x and y. (there may be more than one correct answer)

The lattice enthalpy (formation of ionic solid from ions in the gas phase) for agcl(s) is -916 kj/mol and the hydration enthalpy (dissolution of gaseous ions into water) is -850 kj/mol. how much heat (in joules) is involved in forming 1l of saturated agcl solution (1.8 × 10-4 g / 100 ml water) by dissolving agcl(s)? assume solution volume does not change much upon dissolution. the equations are given below. ag+(g) + cl−(g) æ agcl(s)